US2631621A - Automatic machine for turning wood heels - Google Patents

Description

March 17, 1953 c. w, dr E 2,631,621

AUTOMATIC MACHINE FOR TURNING woon HEELS Filed Jan. 23, 1951 4 Sheets-Sheet 1 i N S INVEN TOR.

tlmr/es I4. 0126 a ATTYs March 17, 1953 c. w. OTTE 2,631,521

AUTOMATIC MACHINE FOR TURNING woon HEELS Filed Jan. 23, 1951 4 Sheets-Sheet 2 INVENTOR. (bar/as Malia March-17, 1953 C. W. OTTE AUTOMATIC MACHINE FOR TURNING WOOD HEELS Filed Jan. 23 1951 4 Sheets-Sheet 3 i: Z4 98 5 :5 g Z/ n 6 INVENTOR. fiber/es It- 0th: v BY l 97 97 Arrrs March 17, 1953 c, w, 1-1-5 2,631,621

AUTOMATIC MACHINE FOR TURNING WOOD HEELS Filed Jan. 23, 1951 4 Sheets-Sheet 4 4a I um 47 46 49 .ggggaifi -20 7- 7 INVENTOR. (/m'r/es W056 Patented Mar. 17, 1953 AUTOMATIC MACHINE FOR TURNING WOOD HEELS Charles W. Otte, CincinnatiQ Ohio, assignor m Vulcan Corporation, Cincinnati, Ohio, acorpor ation of Ohio Application anuary 23, 1951, Serial No. 207,380

' -This invention relates to automatic machines for turning wood heels forshoes and ispar-v ticularly directed to an improved carrier and jack arrangement for passing blanksthrough the forming stations-of said machines.

-An object of the invention is to provide a means which makes practical the use of an endless sprocket chain as-theexpedient for supporting and moving heel blanks through automatic wood heel machines. 1.

'Another object of the invention is to provide an improved and greatly simplified machine for manufacturing wood -heels, including sprocket chain actuated jacks which have associated with their clamping devices a means for stabilizing the chain uponits'track. during the time that said-jacks carry wood heels through a cutting zone of the machine.

A- further object of the invention is to provide ajack for a wood heelmachine having a single cam actuated member to effect a heel blank clamping action and which coacts with certain conveyor parts to hold down that portion of the chain conveyor that carries said jack through the heel blank cutting devices of the machine.

" Another object of the invention resides. in the specific arrangement of jack and conveyor parts whichprovide inan automatic machine a simplified and effective means for carrying a blank through a heel forming operation in afirm and stable manner to preclude vibration vof the blank and/or'chatter of the cuttersas the said blanks are moved against them. 1 -With these and other objects in view the inventlon resides in the particular provision and operation of parts hereinafter fully described and illustrated inthe accompanying drawings in which:

Fig. 1 is a side elevational view of an automatic heel turning machine embodying the features of my invention. Fig. 2 is a top plan view of in Fig. 1. Fig. 3 is an enlarged, fragmental plan view ofa 'cuttingzone for the machine depicted in Figs. 1 and 2, showing the relationship between a cutter device and the heel shaping patterns mounted on said device for coaction with rollers carried by the machine conveyor. Fig. 4 is a side view of a heel jack and certain coacting parts of the jack conveyor, parts being the machine shown broken away and other parts shown in section.

Fig. 5 is a front elevational view of the heel jack, the conveyor parts being shown in cross ev i e 5 Claims. (01. 144-245) Fig.7 6 is a top plan view of the heel jack, the conveyor parts being broken away and one part shown in section. V ,1 Fig. '7 is a section taken on line 7+1 of Fig. 6. Briefly in the practice of my invention I provide ;a plurality of jacks mounted in spaced re, lationship upon an endless chain belt conveyor and movable thereby through a heel cutting or shaping zone, said jacks each having a means for releasing and clamping a wood heel blank and means associated with the clamping means and certain conveyor parts to stabilize that por tion of the chain belt that carries its loaded jack through the said cutting zone.

With particular reference toFigs. 1 and 2 of the. drawings the numeral I, indicates a main table. supported upon side plates 22 and end plates 3-3, whilst numeral Grefers to a forward machine frame, said frame l and table lgsustaining a longitudinal I-beam 5 between them that serves as a structuralmember for supporting the upper reach 6 of a chain belt conveyor shown in the drawing as a triple strand roller chain' 1, The chain I engages a triple strand sprocket 8 at the loading or forward end of the machine, said sprocket being mounted on a shaft 9 journaled at its ends in a pair of laterally spaced bearings l0l0 that are supported upon an extension ll of the frame 4. A corresponding sprocket l2 engages the opposite end of the triple strand roller chain, said sprocket being fixed on a shaft l3 that is journaled in a pair of spaced bearings I l-l4 mounted on a table extension member IS. The said sprocket I2 is driven by a motor l6 suitably mounted beneath the conveyor and connected to the shaft for said sprocket by a chain and sprocket arrangement generallyinidicated by the numeral ll. The motor is therefore adapted to rotate the three annular: rows of teeth in the triple strand sprocket [2 in unison so that they drive the three strands of the roller chain simultaneously in the same direce tion and at the same speed.

As best shown in Figs. 4 and 5 each chain strand 1 comprises the usual spaced series of overlapping links Iii-I9 connected together by pivot pins 20 that pass through all the strands, said pins carrying rollers 2i of smaller diameter than the link widths that are confinedon their respective pins against axial movementby the spaced series of links. The I-beam has a con veyor track member 22 secured by welding,'or

the like, to its upper flange 23, said track being coextensive with the beam and disposed between and in line with the uppermost extensions of the opposed group of sprocket wheels 8 and I2. A number of laterally spaced, roller engaging rails 24 are formed in the track member 22 preferably by milling spaced, longitudinal grooves 25 therein, the number and lateral extent of the rails corresponding exactly with the number and lateral dimensions of the rollers, whilst the groovesare of a width to receive the series of links respectively to thereby preclude lateral displacement of the conveyor and track and permit free longitudinal rolling movement of the chains upon said rails.

An endless series of longitudinally spaced apart, wood heel jacks 26 is mounted upon the chain belt, the jacks being successively moved thereby through a heel forming zone 21 (Figs. 1, 2 and 3) defined by two horizontally swinging arms 28 and 29 carrying cutters 30 and 3i respectively. The general features and functions-of these cutter arms and the coaction of heel patterns fixed on said arms with certain-pattern engaging rollers on the conveyor for controlling the heel shaping movements of the arms is set forth in Patent No. 2,405,941 granted August 20, 1946, andonly a brief description of the features of the present wood heel forming zone will be set forth hereinafter.

With respect to the novelconveyor and wood heel jack arrangement of this invention, all of said jacks are identical instructure'and functions and a description of one of said jacks will suffice-to provide aclear understanding of said arrangement. With reference to Figs 4-7 inclusive the numeral 32 indicates ajack block generally rectangular inplan that has two laterally spaced arms 33- and :34extending rearwardly therefrom. These 7 arms are. mounted on the chain belt by- special chain links 35 and 35 pivot-. ally connected in each strand of the roller chain land having extensions 31 and 38-respectively which embrace the arms. As illustrated in Figs. 4 and 6 the arms 33and34 have transversely aligned, arcuate slots 40 and 41 formed therein whichslidably receive piVll.b0lts'.42 and 43 respectively which pass through axially aligned bores formed in the link extensions 31 and 38 respectively. The forward end of the jack block is pivotally mounted upon the roller'chain .1 bye, numberv of laterally spaced, special chain link depicted in Fig. '7, apairof centrally located slots 44 and 45 being formed in theblock each tore-v ceive-the upper extension on a pair of. links 46 and 41 respectively, whilst speciallinks 48zand embrace the block, all of said links being pivoted to the block by bolts Stand lprojecting inwardly into the block in axially aligned relation withtheir inner ends threaded in a central part 52' ofthe block that is located between the said slots. I

As shown in Fig. 4 the underside of the block is provided with a longitudinally. curved bottom surface 53 to conform to the outer diameterof the adjacent chain portionv as it passes around the end sprockets so that the block may at all times be maintained close to the chain during machine operation. Slots 40 and 41 provide lost motion between the trailing edgeof the. jack block and the chain carrier to compensate for extension between the block and chain portion when they are passed around said end sprockets, it being noted in this respect that said slots have arcuate center lines paralleling the curvature of the bottom surface of the jack block.

The center of the block has an integrally formed platform 54 that has a post 55 secured to its forward end by means of countersunk screws 55. This post is reduced laterally at its upper end and has pivoted to said upper end, by in 51, a pair of rocking levers 58-58. The depressible rearwardly extending and longer ends of the levers carry between their outer ends an arm 59 of a blank clamping foot 60, said arm being pivoted to the levers by a cross pin BI extending between said arms and fixed-thereon against axial displacement by cotter pins 62. The bottom heel blank engaging surface 63 of the foot (Fig. 4) is serrated and coacts with the upper serrated surface 64 of a heel supporting late 65 to firmly clamp a heel blank 66 therebetween when the jack is in operative condition. The plate is adjustably mountedon the platform in longitudia nally selected positions by a countersunk screw 61 that may be threaded in any one of a number of threaded bores 58 formed in the bottom of a key way 69 milled in the platform that is adapted to receive a central key it depending from the bottom of the plate. An adaptor heel upporting late H is mounted ontheforward: end of the platform 54 for. vertical adjustmentdndependent of the plate: 65 by a shank l2 slidably received in a bore 13 formed in the platform, said adaptor being fixed in adjusted position by a set screw 14. 1

The shorter. ends of the levers 58--58 exten forwardly of the fulcrum pin 5'! and have pivoted to their ends a socket member 75,-said socket member having a reduced upper end i6 located between the lever ends andconnected thereto by a pivot pin 77 that passes through a borelB formed in said reducedend.

As best shown in Fig. 4 the means for actuating the'jack comprises a pairyof rockable operating levers iii-430 mounted on the outer ends of the bolts 50 and 5| respectively'which are threaded in the jack block. The-levers have inturned upper ends 8| and 82 respectively. each'provided with an inner, longitudinal projection 83 and 84 which are spaced apart and have pivotally mounted between theman upstanding threaded lug 85. The lug has an'enlar-ged head '86 having a lateral bore therein to receive the centralpor tion of a pin t'l that is fixed at its ends against axial movement in the projeetiens sil nd 84. The upper end of the lug is snugly received in a bore 88 (Fig. 4), of relatively small diameter formedinthe socket: member 15, the majorintermediate part, of; the lug passing. through a relatively large bore 86v inthe member which houses the upper end ofa clamping spring 89. The spring encircles the lug and-bears at its upper end against a shoulder 90 formed in'the socket member between the said bores. The lowest coil of the spring 85 bears against a nut 9| threaded for vertical adjustment on the lug 85. Apair of relatively light contractile springs 92.92 extend betweenthe short arms of levers 58-58 and the post 55 and serveto lightly bias the jack parts toward their open, unloaded positions.

The conveyor hold dowrrand jack clamp; operating means for the machine comprises the depressible, lower depending endsof the jack operating levers l9 and 80, each having journaled at its lower end a cam following roller 93-94 respectively. The rollers are carried through longitudinal camming members that'take the form of two opposed, inwardly opening channels 95- 96 mo nted on and coextensive with the I-beam 5. A number of longitudinally spaced brackets 91 serve as a convenient mounting means for'said channels, said brackets being welded to the cen-- tral web ,of the I-beam and having U -shaped outer ends 98 embracing spaced apart portions of the channels (Fig. 5). As best shown in Figs. 4 and 5 the upper flange of each channel 95-96 has a camming surface 99 and I respectively which function to depress the cam rollers 93 and 94 in unison and placethe spring 89 under operative compression which operates the jack clamp to hold a heel blank therein. The camming sur faces extend along the entire lengths of the channels except for a short distance at the heel blank loading end of the machine where the jacks must remain in open, inoperative conditions until a heel blank has been inserted therein.

I Each of the jacks carry a pair of opposed, transversely' extending pattern cam engaging rollers IOI I02 each mounted on an arm I03I04 respectively secured to the central portion of the jack block. Interspaced between adjacent jacks is a'bar I (Figs. 1 and 2) secured to the triple strand roller chainby bolts, or the like, and extending laterally beyond the sides of the'chain. The barextensions' have mounted thereon rollers I06I01 respectively that serve to return the cutter tools to operative cutting position after each successive cutting operation is performed on heel blanks passed through the cutting zone on the conveying jacks.

With reference to Figs. 1 and 2 of the drawing thenumeral 2! refers to the cutting zone for the machine, said zone having the two horizontally swinging arms 28 and 29 pivotally mounted on vertical standards II I I I2 that are anchored on the table and disposed on opposite sides of the chain conveyor. As most clearly shown in Fig. 2 the cutter arms extend at an angle into the path of the heel jacks carried by the conveyor, and it will also be noted that the swinging arm 28 is in an advanced position with respect to arm 29 and the direction of movement of the chain belt. Each arm 2829 has journaled in its outer end a vertical spindle which has fixed to its lower end the cutters 30 and 3| respectively, said spindles being driven through pulleys and belts by motors I I5-I I6 mounted on brackets carried by the standards. The arms are urged toward the conveyor by gravity actuated weights (not shown) secured to the ends of pull ropes I I1 and I I8 that are connected to the arms.

In Fig. 3 there is shown a cam I I9 fixed to the swinging arm 28 and adapted to contact the roller I06 as it is moved through the cutting 'zone 21 to swing the arm outwardly away from the conveyor and position said arm and the cutter carried thereby in the initial cutting position. Just as the said cam I I9 positions the cutting arm in its initial cutting position roller IN on the jack block 32 contacts the leading edge of a pattern I20, removably secured on a bracket I2I on the swinging arm 28, said pattern then controlling the movement of the arm 28 so that the cutter 30 will describe a forming movement adapted to form half the side of the blank from the front edge to the center of the back of the blank. After the particular jack leaves the cutter 30 it is moved. past the cutter 3| and similar cams and patterns on said arm 29 on that side of the machine are operated by the rollers I02 and I01 to form the opposite side of the heel blank from the forwar edge to the center of the blank. 7

My machine is particularly adapted to turn the outside face of a wood heel for a so-called platform shoe on blanks which may or may not have the upper seat and bottom surfaces preformed. In operation the motors I15 and H6 for driving the cutters 30 and 3I are kept in continuous operation. Also the motor I6 continuously drives the chain belt 6 to successively move heel jacks carried thereby through the cutting zone 21. Blanks 66 are manually inserted in each heel jack at the loading station which is located above the frame 4 forthe machine. Loading is done by locating the blanks between clamping feet 60 and heel supporting plates 65 of the jacks as they successively move along the loading zone. As each jack is moved by the roller chain 6 in a. direction away from the sprocket 8 to and upon the rails 24 the jack hold down and jack operating rollers 93 and 94 are entered into the forward ends of camming channels 95 and 96 and after moving a short distance past the loading zone said rollers are simultaneously depressed by camming surfaces 99 and I00 respectively which place the spring 89 under compression which in turn actuates the clamp and provides stabilizing forces for the chain conveyor whilst the jack is moved through the cutting zone. Upon leaving the channels 95 and 96 at the discharge end of the machine the jack although in open, inoperative condition continues to support the finished work I22 until the jack has traveled along the lower conveyor reach and starts its upward movement around sprocket 8 toward its loading position at which time the heel falls by gravity into a hopper I23.

When the jacks are in clamped positions it will be noted that the levers I9 and 80 for each jack are depressed'by the camming surfaces 99 and I00 of the channels 95 and 96 respectively and that the foot 60 is forced down upon the heel supporting block. The heel supporting block transmits said clamping force to the jack block 32 and hence to the triple strand roller chain to force said roller chain down upon the conveyor track 24. The spring 89 is made for relatively heavy duty and is adapted to effectively hold the jack down upon the track and clamp the heel blank to the jacks to prevent chattering or vibration of the jack whilst it carries a heel blank through the cutting zone. The spring also functions to preclude vibration by reason of worn bearing surfaces in the chain, chain mounting and jack clamp mechanism and also compensates for varying thicknesses of hee1 blocks placed in the jack because the thicker hee1 blocks require greater stability when moved against the forming cutters and such blocks will compress the spring to a greater extent and place it under greater compression, such force being transmitted by the depgessaigole levers 58-58 and the operating levers What is claimed is:

1. In a machine of the character described a fixed rail extending through a forming zone on the machine, an endless roller chain conveyor having an upper reach supported upon the rail, a number of jacks mounted on the conveyor in longitudinal spaced relation, a blank support on each jack, a clamp arm rockably mounted on the jack and having a depressible portion located above and cooperable with the blank support to clamp a blank therebetween, a rockable lever mounted on, and having a depressible portion extending from the side of the jack, an extensible connection between the opposite portions of the arm and lever, spring means for biasing the connection toward extended positions, a cam track paralleling the rail, and a roller follower on the end of the depressible portion of the lever for engaging in the cam track, said follower being located below the plane ofthechain and inavertical alignment with; the blank support for the jack.

2. In amachine "according to claim l-characterized by the fact that a 'rockable lever is located on each side of the jack and said-levers are pivotally, mountedthereon for unitary movement around a common axis, that a cam track parallels each'sideof the rail, and that each lever has a follower thereonin engagement with its respective cam track.

3.'In a machine according to claim 2further characterized by the fact that each jack comprises a block pivotally mounted at one 'end on laterally'spaced apart links of the chain conveyor, and the opposite end of the block is mounted on laterally spaced apart links which have a lostmotionconnection with the said block end.

4. Ina machine'of the character described a fixedrail extendinginto and througha forming zone on the machine-an endless roller chain providingan'upper' conveyor reach supported upon, and having rolling contact with the fixed rail, a number of jacks'mounted upon the upper reach of the chain conveyor in longitudinal spaced relation; adepressible blank clamp on each jack, a depressible member'mounted on, and extending from-each jack, cam follower on the freeend por tion of the member, a spring connection between the member and the clamp, and a fixed cam track paralleling the railfor engaging the cam follow- 3 ers to successively depress the lever on each jack as it is moved into and through the forming zone of the machine to operate the blank clamps, said spring connections being effective to secure the resp ctive blanks in-the Jacks and to hold the jacks and-their subjacentconveyor portions down upon the rail under a jack stabilizing, yieldable pressure of the spring connection.

5. :In a machine of the character described a fixed-rail extending into andthrough a forming zone-onthe machine, an endless roller chain conveyor having an upper reach supported by, and in r olling contact with-the fixed rail, a number of jacks-mounted upon the conveyor reach in longi-. tudinal spaced relation, a compressible blank clamp on each jack,- a' depressible clamp operat-v ing member mounted on, and extending from each jack, a resilient, connection between the member and the blank clamp, a cam track parallel to and coextensive with the rail, and a cam follower on each clamp operating member adapted to engage the trackto operate the blank clamp and to hold the jack and its subjacent conveyor portion down upon the rail as the jack is moved by the'chain conveyor into and through the forming zone of the. machine.

CHARLES W. OTTE.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,412,910 Whipple Apr. 18, 1922 1,496,539 Hudson June 3, 1924 1,689,459 Small Oct. 30, 1928 2,346,039 Montague Apr. 4, 1944

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